There is no pipe inside. The baseboard is the pipe. If it is leaking between sections, then you have to disassemble it and replace the nipples. If the section itself is leaing, then you need a new 2 foot section.: I HAVE A CAST IRON BASEBOARD RADIATOR,IT IS LEAKING. AFTER I PULL IT AWAY FROM THE WALL, CAN I REPLACE THE PIPE INSIDE, OR IS IT A ONE PIECE UNIT.
